Corals
Corals are invertebrate animals belonging to a large group of colourful animals called Cnidaria.
Each coral is called a polyp.
Corals form barriers to protect shorelines from waves and storms.
Coral Reef
A coral reef is an underwater ecosystem characterized by reef-building corals.
Reefs are formed of colonies of coral polyps held together by calcium carbonate.
Most coral reefs are built from stony corals, whose polyps cluster in groups.
Galápagos Islands
The Galápagos Islands are a group of islands, or archipelago, in the eastern Pacific Ocean.
There are thirteen major islands and a handful of smaller islands that make up the Galápagos archipelago.